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  <title>Redefine an already defined constant</title>
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  <div id="layout-content"><div id="function.runkit7-constant-redefine" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">runkit7_constant_redefine</h1>
  <p class="verinfo">(PECL runkit7 &gt;= Unknown)</p><p class="refpurpose"><span class="refname">runkit7_constant_redefine</span> &mdash; <span class="dc-title">Redefine an already defined constant</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.runkit7-constant-redefine-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>runkit7_constant_redefine</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$constant_name</code></span>, <span class="methodparam"><span class="type"><a href="language.types.declarations.html#language.types.declarations.mixed" class="type mixed">mixed</a></span> <code class="parameter">$value</code></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$new_visibility</code><span class="initializer"> = ?</span></span>): <span class="type">bool</span></div>

  <p class="para rdfs-comment">

  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.runkit7-constant-redefine-parameters">
  <h3 class="title">参数</h3>
  <dl>
   
    <dt>
<code class="parameter">constant_name</code></dt>

    <dd>

     <p class="para">
       Constant to redefine.  Either the name of a global constant,
       or <code class="literal">classname::constname</code> indicating class constant.
     </p>
    </dd>

   
   
    <dt>
<code class="parameter">value</code></dt>

    <dd>

     <p class="para">
       Value to assign to the constant.
     </p>
    </dd>

   
   
    <dt>
<code class="parameter">new_visibility</code></dt>

    <dd>

     <p class="para">
      The new visibility of the constant, for class constants.
      Unchanged by default.
      One of the <strong><code>RUNKIT7_ACC_*</code></strong> constants.
     </p>
    </dd>

   
  </dl>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.runkit7-constant-redefine-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>true</code></strong>， 或者在失败时返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.runkit7-constant-redefine-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.runkit7-constant-add.html" class="function" rel="rdfs-seeAlso">runkit7_constant_add()</a> - Similar to define(), but allows defining in class definitions as well</span></li>
    <li class="member"><span class="function"><a href="function.runkit7-constant-remove.html" class="function" rel="rdfs-seeAlso">runkit7_constant_remove()</a> - Remove/Delete an already defined constant</span></li>
   </ul>
  </p>
 </div>



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